Loom.



PATENTED NOV. 19, 1907.

a SHEETS-SHEET 1.

- ---LLL/ /NVE/VTOH LOOM.

APPLIUATION FILED Auefza, 1906.

P. JOHNSON.

WI'TNESSES A TTOHNEY PATENTED NOV. 19, 1907.

F. JOHNSON.

LOOM.

APPLIoATIoN FILED AUG.2s,19oe.

W/TNESSES M uw# A TOHNEY PATENTED NOV. 19, 1907.

F. JOHNSON.

LOOM.

APPLIGATION FILED AUG,2H.1906.

3 SHEETS-SHEET 8.

Ummlhlm.

/NVENTOH W/TNESSES Arma/vif FATFNT OFFiOF.

FRANK JOHNSON, OF NFw YORK, N. Y.

-f LOOM.

specinca'tin of Letters Patent.

Patented Nov. 19, 1907.

Application filed August 28. 1906- Serial No. 332'320.

To all whom it may concern:

Beit known that I, FRANK JOHNSON, a citizen of the United States, residing in the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful linprovement in Looms, of which the following is ra specication.

The linvention relates more particularly to looms for weaving wire fabrics and to the take-up and let-off mechanism for such looms.

The object of the invention is to provide simple and positively-acting mechanism for taking-up the woven fabric and for automatically letting-off a predetermined length of warp-wires at proper intervals.

The invention consists in certain novel features and details of construction by which the above objects are attained, to be hereinafter described.

The accompanying drawings form a part of this` specilication and show a preferred form of the invention as applied to a loom, with so much of the weaving mechanism as is necessary to show the relation of the invention thereto.

Figure '1 is a front elevation of a loom equip ed with the invention. Figs. 2 and 3 are e evationsof the opposite sides of the loom. Fig. 4 is an elevation on a larger scale showing the feeding device for the letoff mechanism. Fig. 5 is a vertical section partly in elevation showing the controlling means for such mechanism. Fig. 6 is a face view of a' portion shown in the preceding figure. Fig. 7 is a diagram showing the electric circuit.

Similar letters of reference indicate the sameparts in all the figures.

A A are the side-frames of the loom, and B is the hatten or lay swung from centers B1 B" at the top of the frames and eq ippcd with a reed and shuttle-throwing means, not

. shown, but which may be understood to be i similar to that described in Letters Patent to me dated April 12, 1904, No. 757,121. The lay is caused to swingby double cams E carried on the main shaft El and makes ltwo beats or oscillations to each pick, as in the above patent.

At one end of the shaft El is a bevel gearwheel E2 meshing with a similar wheel F2 on the upper end of an inclined shaft F carrying at its lower end a smaller bevel gearwheel Flin mesh with a similar wheel Gr1 on a horizontal shaft G extending transversely of the loom parallel with and in rear of the main shaft El and revolving at the saine rate. The shaft G carries cams G2 acting on heddle-levers H to which is attached the harness for operating the heddles. The gearing from the main shaft is so proportioned as to induce one change of shed to the above-described two beats of the lay.

J is a controller or commutator carried on the projecting end of the shaft G, consisting of a circular disk of metal insulated from the shaft and having a spring contact-piece J on its outer face adapted to make wiping Contact with a fixed contact-point K1, carried on an arm A1 of the frame, and connected to a binding-post K. Another fired arm A2 carries a spring J2 in continuous wiping contact with the inner face Of the disk and serves to complete an electric circuit through the latter and any electric devices connected to the binding-post K. The circuit is shown in Fig. 7.

The warp-beam is marked C and carries the warp-wires as usual. It has a drum C1 at one end partially encircled by a brakestrap Or shoe C2 attached to a brake-lever C3 held by a weight CA1 in position to hold the drum and warp-beam against revolving, and raised to release the warp-beam by the action of a solenoid M Afined to the frame, and receiving a core M1 attached to the brake-lever. The solenoid is in the circuit and when the latter is completed through the spring contact-piece, is energized during suoli short period of contact and draws in its core M1 to lift the brake-lever and permit a short length of warp-wires to be drawn off. The warpwires are led over a guide-roller D having at one end a pinion Dl in mesh with a gearwheel C5 on the warp-beain so as to revolve therewith and at the other a worm-wheel D2 engaged by a worin D3 rotated to turn the guide-roller and warp-beam by an electrically operated feed-mechanism. The warpwires are led from the inner face of the warpbeam upwardly beneath and partially around the outer face of the guide-roller so that the opposite rotation of the beam and roller due to their gear and pinion tends to move them in the same direction as the travel of the warp-wires thereover.

The electric feeding-device for the worm D3 may be variously constructed, I have shown a ratcliet-wlieel D4 on the end of the worm-shaft engaged by a pawl N5 moving in .bell-crank lever is oscillated by the movement of an armature N1 toward the cores of an electro-magnet N energized by a current through the binding-post K. The armature is joined to the short arm of a bent-lever N2 fulcrumed at n2 and connected through its long arm to the short arm of a straight intermediate lever N3 the long arm of which is in turn connected to the short arm of the bellcrank lever N4.

The short downward pull of the magnet, augmented through the system of levers, tends to move the pawl through a considerable arc, making a full or complete stroke and inducing themaximum turn of the wormshaft and permitting the longest feed. The length of feed is regulated by varying the position of the casing A3, the end of the slot a in the latter serving as a stop and determining the extent of the return movement of the pawl due to the action of the spring N7. By properly positioning the casingA3 the amount l of feed may be proportioned very exactly to the requirements.

L is the cloth-beam at the front of the loom receiving the Woven goods after its passage over the breast-beamL. It is subj ected to the constant tension of a weight L2 suspended from' a cord LR wound on a drum L4 and extending upward over a pulley L5. The weight is elevated after each descent by rewinding upon the drum which is connected to the cloth-beam by the pawl L acting upon the ratchet-wheel L7.

The binding-post K is set in a concentrically curved slot al in the arm A1 so that it may be adjusted in the path of the springcontact `J1 and the action of the brake and feed mechanisms accurately timed relatively to the movements of the heddles and lay.

Although I have described the brake as released by the action of a solenoid, and the worm as actuated by an electro-magnet, it will be understood that the velectric energy may be utilized in either of these forms in either or both situations.

The system of levers from the magnet N to.

structed to resist the tendency of said beam to rotate when said brake is released.

.3. In a loom of the character set forth, a warp-beam, a brake thereon, an electrically actuated releasing-means for said brake, a feed-roller geared to said warp-beam, an electrically operated feeding devicefor said roller, an electric circuit in which said releasing-means and feeding device are located, and a controller for making and breaking such circuit.

4.-. In a loom of the character set forth, a warp-beam, a brake thereon, an electrically actuated releasing-means for said brake, a feed-roller geared to said warp-beam, an electrically operated feeding device for vsaid roller, a shaft for operating the heddles, an electric circuit in which said releasing-means and feeding device are located and a controller operated by the revolutions of said shaft for making and breaking such circuit.

5. In a loom of the character set forth, a warp-beam, a feed-roller geared to said warpbeam, a worm-wheel on said roller, a worm in mesh with said worm-wheel, a ratchet-wheel on said worm, a pawl arranged to engage said ratchet-wheel, a lever in which said pawl is mounted, an electro-magnet for moving said lever, an electric circuit in which said lectro-magnet is located and a controller operated by a moving portion of the loom for making and breaking such circuit.

6. In a loom of the character set forth, a warp-beam, a feed-roller geared to said warp-l beam, a worm-wheelA on said roller, a worm in mesh with said worm-wheel, a ratchetwheel on said worm, a pawl arranged to engage said ratchet-wheel, a lever in which said pawl is mounted, an electro-magnet for moving said lever, an electric circuit in which said electro-magnet is located, a controller operated by a moving portion of the loom for making and breaking such circuit, and a stop for limiting the movement of said pawl.

In testimony that I claim the invention above set forth `I affix my signature, in presence of two witnesses.

FRANK JOHNSON.

Witnesses:

CHARLES R. SEARLE, F. E. EocARDT. 

